Incremental Pricing

Hi, could you please explain to me how to have incremental pricing based on quantity.

For example:
If the base price for a Product X is $50, then each additional Product X ordered is $1.
Therefore, if quantity 2 of Product X is purchased, the cart total would be $51.
If the quantity 20 of Product X is purchased, the cart total would be $69.

Thank you!

Thank you, but unfortunately my products have unlimited quantity, so does that mean I would have to set up each price manually all the way up into the hundreds? What if someone orders 200 quantity, etc?

Is there a more automated way to do this in Options , Varients, or Characteristics?
Really what would work is if I could just add $50 per product ordered , regardless of how many they order
Thanks again

In this particular store, EVERY product is $50 for the base price. So perhaps there's a quick line of code I can insert that would add $50 to each instance of a product in the shopping cart?
Then just set the product price at $1.

I do understand that if I change the code, I'll have to do it again after updates. Thank you